The Importance of a Single Database

Sharding is effectively splitting your database, database up in such a way that the data is not related to one another. So an example would be if you've got customer data, and you're never doing any cross customer querying,. Then you can put customers on different databases that are completely separate from each other. If you do need to actually compare information across your customers, then you can solve that problem by having some sort of background process that chunnels that data to us.